<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<meta http-equiv="X-UA-Compatible" content="ie=edge" />
		<title>vdom</title>
		<style>
			body {
				width: 100vw;
				height: 100vh;

				margin: 0;
				padding: 0;
			}

			canvas {
				position: fixed;
				left: 0;
				top: 0;
				width: 600px;
				height: 400px;
			}

			#app {
				z-index: 1;
			}

			.btn {
				position: fixed;
				right: 2rem;
				top: 2rem;
			}
		</style>
	</head>

	<body>
		<div id="app"></div>
		<button class="btn">start</button>
	</body>
</html>
